This multiband, small
(2% wavelength), but very efficient, IEK Antenna can be achieved simply
switching a tapped coil, and no capacitors. The comparative advantages of such a small antenna are of course more effective in the lower HF bands, where conventional antennas are much bigger.

The purpose of this document
are reflections, research, project and construction ; beyond practical
suggestions on antenna construction, it is intended to stimulate a more deep
look at the theoretical fundaments, open to contributions.